Type-writer carriage-return mechanism.



N. L. ANDERSON. TYPE WRITER CARRMGE RETURN MECHANISM. APPLICATION FILED APR, 10, 59|5u I 1,187,124, Patented June 13, 1916.

3 SHEETS-SHEET I- l/V VE/V TOR Arm/Mrs 3 SHEETS SHEET 2- Q E M R mm M V 1 N. L. ANDERSON. TYPE WRITER CARRIAG RETURN MECHANiSM.

APPLICATION FFLED APR. 10. THIS Pnflmtvd Jmm 13, 1916.

N. L. ANDERSON.

TYPE WRITER CARRIAGE RETURN MECHANISM.

APPLICATION FILED APR. I0. 1915.

Patented June 13, 1916.

3 SHEETSSHEET 3.

IHVENTDR A TTORNEYS NEAL LARKIN ANDERSON. 0F WINSTON SALEM. NORTH CAROLINA.

TYPE-WRITER CARRIAGE-RETURN MECHANISM.

Application filed April 10, 1915.

To all whom. it 111 my concern:

Be it known that l. NEAL L. Axnnnsox, a citizen of the United States. residing at \Vinston-Salem. county of Forsyth. and State of North Carolina. have invented certain new and useful Improvements in Type- W'riter (Tarriage-Return Mechanism; and I do hereby declare the following to be a full, clear. and exact description of the invention. such as will enable others skilled in the art to which it. appertains to make and use the same.

This invention relates to carriage return mechanism for typewriters and similar machines and more particularly to return mechanisms in which a motor is employed for effecting the return of the carriage at the end of the line of print.

The object of the invention is to provide a return mechanism of this character which is simple in construction, which may be operated by unskilled persons, which is reliahle and efficient in its operation. with which the speed of the return movement is automatically regulated, with which a return movement of any length is effected without excessive jarring of the parts of the mechanism. and which is. controlled by a single manually-operated key lever regardless of the distance through which the carriage is to be returned.

A fundamental characteristic of the invention is embodied in the mechanism for automatically controlling the motor by which the return of the carriage is effected. Preferably, an electric motor is employed and the automatic control thereof is effected by introducing and withdrawing resistance from the circuit of the motor. The automatic controlling devices are such that when the operating lever is actuated to close the circuit of the motor, the latter is caused to operate with sufliciently high torque to insure movement of the carriage with the desired rapidity, and toward the end of the movement of the carriage, resistance is automatically introduced into the circuit of the motor so as to diminish its torque in order to avoid excessive jar at the end of the movement of the carriage but insure that the carriage will be positively moved to the end of its travel. The means for introducing the resistance into the motor circuit, is arranged to be governed automatically hy the extent to which the carriage was moved prior to the actuation of Specification of Letters Patent.

Patented June 1 3, i916.

Serial No. 20,379.

the return Illt't'ltillllSlIl: it the carriage was moved to the limit of its travel or practically so. the maximum resistance is intro-- duced into the motor circuit near the conclusion of the return movement, and movement of the carriage to an extent ess than the maximum results in the introduction of less than the whole amount of resistance into the motor circuit near the conclusion of the return movement of the carriage. lVith such an automatic controlling mechanism, the closure of the motor circuit results in starting the motor with relatively high torque so that the return movement of the carriage is effected rapidly and a substantial amount of momentum developed. As the carriage nears the end of its return movement, the resistance is introduced into the motor circuit and the torque of the motor is correspondingly reduced. The momentum previously developed may he sutli- ,cient to carry the carriage to the end of its return movement without excessive jar after the torque of the motor is thus re duced, but irrespective of this. the motor continues in o 'icration and if necessary, completes the return movement of the carriage.

The automatic regulation of the motor circuit arranged in this manner possesses the further advantage that it facilitates providingfor the return of the carriage through short distances without excessive jar and actuation of the return mechanism with a. single lever irrespective of the distance through which the carriage is to be returned. W'hcn the carriage is moved hut a short distance. as when the typewriting. machine is used to write a short line. iti's undesirable to have the motor, in effecting the return movement, develop the same initial torque as is pro vided for in returning the carriage through the whole range of its movement. In accordance with the invention, provision is made whereby when returning the carriage after the writing of slrort lines. resistance is automatically introduced into the motor cir cuit so that such return movement will he effected with the motor developing a reduced torque. However. the resistance introduced into the motor circuit when returning the carriage through short distances is less than the maximum amount introduced at the end of a return movement of the carriage through its full range, for the reason that if the full amount of resistance were introduced when returning the carriage through a short dis ince.the starting torque of the motor Vii ic insufficient to insure a prompt and .ic rcturn of the car'- riage. liv reason of the provision of such automatic mioirclling devices for regulating the current ilovr in the motor circuit both when returning the carriage through its full range and when returning it through short i'listanccs. a single operating lever sufiiccs for the actuation. of the incchani u ander all conditions. Furtlwrmore. the mechanism may be greatly simplified. cs eciaily in the elimination of numerous latclics and triggers. so that it may be readily operated by unskillcd persons and may he relied on to operate eiiectivcly under all conditions without excessive jar.

The fcatm'cs of the invention above referred to and other features of substantial value and importance will he better under stood by rc'fercncc to the following descripiion taken in connection with the accompanying drawings illustrating one form in which the invention may be embodied.

in these drawings. Figure 1 is a front view of a typewriter having a return mechanism constructed in accordance with the in vcntion attached thereto; Fig. '3 is a top view of a portion of the typewriter; Fig. 3 is a, central longitudinal section through the re turn mechanism; Fig. 4 is a top view of the return mechanism; Fig. 5 is :1 transverse section on line 55 of Fig. 3; Fig. (i is a diagrammatic view showing the electrical comotions; Fig. 7 is a sectional elevation shov mg the key-lever and the switch operated thereby: Fig. la is a sectional elevation showing the rhcostat; Figs. 9 and i1 are views. partly diagrammatic, showing the coopcrating contacts andthe electrical connections thereto; and Fig. 10 is a top view of the contacts.

Referring to these drawings. A indicates a typewriter having the usual reciprocating paper-carriage B which is provided with an ordinary rotary platen U by means of which the paper is supported and spaced for successive lines of printing. At the right of the carriage 13 is thc usual pivoted and spring-retracted lever D which is grasped in order to return the carriage by hand and at the same time eil cct the line spacing.-

The return of the carriage is effected by a. cord or tape 15 which is connected to and wound on a winding drum I mounted on the shaft F of an electric motor. This tape passes over a. pulley G mounted on the frameof the machine and its end is connected to a pin H on a reciprocating bar I. This bar is guided in its movements by projections and 2" mounted on the frame of the carriage and the end of the bar is connectcd to a crank K which is secured to the shaft of the lever D For the purpose of returning the carriage when the end of the desired type line has been reached. I employ the automatic can riage-return mechanism L shown at the right in F ig. 1 and comprising a casing M Within which the motor and certain of the parts actuated thereby are inclosed. The shaft F of the motor projcys through the end of the casing M and carries the drum P on which the tape E is wound. Rotation of the shaft of the motor in a counter-clockwise direction revolves the drum so as to wind the tape thereon to return the carriage and at the same time effect the line spacing by means of the devices above described.

The automatic regulation of the speed of the return movement of the carriage will now be described. Referring particularly to Figs. 3, 4 and 5, the shaft F of the motor has a worm 7 thereon which meshes with a worm-wheel S mounted upon the upper end of a shaft 9. which is adapted to rotate in bearings formed in the base of the casing M and in a bracket 10 projecting laterally from a wall of the casing. On this shaft 9 is a sleeve 11 of insulating material and a metallic collar 12 surrounds a portion of this insulating sleeve 11 and is adapted to rotate loosely thereon. The lower end of the collar 12 fits within a piece of molded insulated material 13 mounted upon the base of the casing M and shaped to form a. spool upon which the resistance wire 10 hereinafter referred to is wound. The insulating material 13 constitutes a haseplate upon which a plurality of contacts 14, 15, 16, 17 and 18 are mounted. These contacts are adapted to be engaged by a switch-arm 19 pro ecting from the collar 12. In addition to the contacts 14 to 18 are two other contacts 20 and 21 of arc shape, the several contacts 14. 15, 16, 17. 18, 20 and 21 being arranged in the arc of a circle as shown. The contacts 20 and 21 are adapted to be engaged liy an arm 22 which projects laterally from a collar 23 mounted upon the shaft 9 so as to turn therewith hut insulated from the shaft as shown in Fig. 5. Electrical connection to the collar 23 is made by a springarm 39 mounted at one end upon astud on the insulntin base 13 and having its op 0- site end hearing against the collar 23. he collar 23 has a stud or screw 24 projecting laterally therefrom and adapted to engage a stud 25 rising from the disk at the upper end of the collar 12 so that when the collar 23 and its screw 24 are turned with shaft 9, the screw '24 engages stud 25 and turns the latter and thecollar 12 so as to carry the contact arm 19, which is fixed to the collar 12, around over the contacts 14, 15, 16, 17 and 18. Such movement of the collar 12 is effected against the tension of a spring 26 connected at one end to a stud on the collar 12 and at the other end to a screw on the insulating base i3. \Vhen the collar 12 is released as hereinafter described and retracted by the spring in. its backward movelnent is arrested by a stud or contact J7 ris ing from the insulating base 13 and so positioned that it is engaged by the arm-l9 when the latter rests upon the contact 14.

After the arm 19 has been moved against the tension of spring 26 by the screw 24 on collar it is held in the position to which it has been moved when the collar 23 is turned back. For this purpose, the edge of the disk at the upper end of the collar 12 is provided with ratchet teeth, as shown in Fig. 4, adapted to be engaged by the end of a pivoted lever 28 whose end is pressed toward the teeth by a spring 49 mounted upon the insulating base 13. The opposite end of the lever 28 is adapted to react with a cam 50 (Figs. 4 and 7 mounted uponthe operating lever 31. whose end projects forward to a convenient position and carries a key 32. The lever 31 is pivotally mounted upon a standard rising from the base of the casing M and is provided with an offset 34 (Fig. 5) adapted to engage a stud 35 projecting upwardly through an opening in the base of the casing from a spring-arm 87 (Fig. 7 This arm is mounted at one end upon an insulating block 36 and at its opposite end it is adapted to engage a contact Y which is similarly mounted upon an insulating block secured to the under side of the base of the casing M.

The electrical connections will be best understood by reference to Figs. 6, 9 and 11, wherein the motor N ed thereto are shown diagrammatically. Current is supplied by -ires w. w which may lead from a plug adapted to be inserted in a socket of the usual construction. The wire 20 leads to one side of the ,seriesmotor N. and from the other side of the motor, connection is made to the spring-arm 87 which is actuated by the key-lever 31 as above described. The arm 87 and its cooperating contact Y are shunted by a condenser T. From the contact Y a wire W leads to the arm R of a rheostat R. which may be adjusted to adapt the apparatus for use upon circuits of different voltages. This rheostat and its controlling arm R are mounted upon the underside of the base of the motor casing M as is shown in Fig. 8. From the other side of the rheostat. a wire 38 leads to the contact 37. from which electrical connection is made to the collar upon which the switch-arm 22 is mounted by the spring-arm 39 shown in Fig. 4. The other side of the circuit is connected by the wire w to the contact 20 as shown and by a wire 41 to the stud on the base 13 to which the spring 26 is connected. 40, which is wound upon the insulating base -13 is connected at one end to the contact 21 and the parts connectturning the shaft F and The resistance wire and at the other end to the contact 18. At a plurality of intermediate points on the resistance wire 10, connections are made to the contacts 1.7. 1U, 15 and ii and to the stud 27, as shown diagrammatically in Fig. 6.

The operation of the parts thus constructed and arranged will now be described.

As the carriage of the typewriting machine moves from right to left during the writing operation. the armature of the mo tor and its shaft F are turned in their bearings by the tape 1*) which is drawn off from the drum 1.. This results in turning the shaft J through the worm gearing T and 8 aml the contact-arm :22 is moved around in a conntcrwloclnvise direction over the contacts 21 and .20. ll a line of the maximum length be written so that the carriage moves through its full range, the arm 22 moves from the position shown in Figs. (3 and 11 at one end of the contact :21 over that contact and the contact 20 to the distant end of the contact 20. During this movement of the arm 22. the screw 24 on the collar 23 olthe arm 22 engages the stud .25 on the loose collar 12 and turns that collar and the arm 19 thereon. thus causing the arm 1!) to move over the contacts ll. 15. us. 17 and 18. If it be desired to return the carriage to the initial position. the .key 32 is depressed. This carries cam 50 away from lever 28. the latter is moved by spring 4! to engage the teeth on the edge of the disk on sleeve 12. and arm 15) is thus held in the position to which it was moved. The deprcssion of key 3:2 depresses the stud 1&5 on the switch-arm 87 so as to close the motor circuit at the contact Y. (ur .-nt then flows from the wire u through the motor N to the switch-arm 87, contact Y. wire \l'. rheostat R, wire 38. stud 3?. arm 39. collar 23 and arm 22 to contact :20 and then out through the wire in. The full current is thus admitted to the motor and the latter starts in operation at its full torque. thus drum I and wind ing up the tape IQ on the drum. As the shaft F rotates. it causes rotation of shaft 9 and the arm 12; thereon is carried around over'the contact 20 and upon the contact 21. The arm 22 rcachcs the contact 21 when.

the carriage nears the end of its return movement and the passage otthc arm 22 from the contact 20 to the contact 21 introduces the resistance 40 into the motor circuit.so that the How of current through the motor and consequently the torque of the motor, are considerably diminished. It will be seen that after the arm 22 moves upon the contact 21. the current How will. be from the arm 22 to the contact 21. then through the resistance 40 to the contact 18. arm 19. sleeve 12. spring 26 and wire 41 to the wire r The conclusion of the return movement of the carriage will thus be effected with the resistance 40 in the motor circuit. During the preceding movement of the carriage efl'ected prior to the introduction of the resistance, an. amount of momeutum may have been developed sutlicient to carry the carriage to the end of the range of its return movement, but it such an amount of momentum had not been developed, the operation of the motor with the reduced torque would serve to carry the carriage promptly and positively to its final position. After the carriage reaches its i'iual position, the key-lever 32 is released and is returned to its normal position by the springer-m 57. The upward movement of the key-lever effected thus, carries the cam 50 into engagement with the end of the lever 28, thus turning the lever so as to withdraw its end from coaction with the teeth of the ratchet on the sleeve 12. The sleeve, being thus released, is retracted by the spring 26 so that the arm :52 is moved around over the contacts from the contact 18 to the contact 14. where its movement is arrested by the stud :27.

If the typewriter were operated to print a short line so short that the movement of the carriage caused only a slight movement of the arm 22 over the surface of the contact 21 and no movement of arm 19, the closure of the motor circuit by depression of the key-lever 32 would he etl'ected with a portion of the resistance 40 included in the motor circuit so that the motor would operate to return the carriage with its torque substantially reduced. The path of the current would then be from the arm 22 to contact 21, then through the first section of the resistance 40, then by the connecting wire to the stud :27, then to arm 1%) in contact with stud .27. to sleeve 12, spring 26 and wire 41 to wire 10'.

If the typewriter were a line of greater length, the movement of the arm 22 corresponding to the movement of the typewriter carriage would carry the screw 24 into engagement with the stud 25 so as to move the arm 19 from the contact 14 to oneof the contacts 15, 16. 17 or 18 depending on the length of the line written. Then the closure of the motor circuit by depression of the key 32 to effect return of the carriage would result in starting the motor with high torque, the current flowing from the arm to the contact 20 and out through the wire 11:. The return movement of the carriage thus effected would cause movement of arm 22 and when the arm passed from the contact 20 to the contact 21, resistance would be inserted in the motor circuit: this resistance, however, would be less than the whole amount of the resistance 40 by an amount depending upon which one of the contacts 14 to 18 was engaged by the arm 19 at the conclusion of the advance operated to write movement of the carriage. Thus, if a line of substantially the full length be written, the advance movement of the carriage is accompanied by movement of arm 22 from contact 21 to contact 20 and arm 19 from contact 1 to contact 18; then the return movement. would be efl'ected first with no resistance in the motor circuit and then with all the resistance 40 in circuit. If a line of less length were written, the return of the carriage would be effected in the same manner except that in writing the shorter line, the arm 19 would not be moved all the way around to the Contact 1.8 and therefore a less amount of resistance would be out into the motor circuit toward the end of the return movement. If a very short line were written, the arm 19 would not be moved at all and the arm 22 would not move ofi the contact 21 during the advance movement; therefore, resistance would be included in the motor ircuit and the torque of the mo tor proportionately diminished at the start and throughout the whole of the short return movement of the carriage, but this resistance would not be of such large amount as would cut down the power of the motor an undesirable extent. If it were at tempted to return the carriage through a,

short distance with such an amount of re- 1 sistance in circuit as is desirable during the corresponding portion of the full return movement of the carriage, it would be found that the starting torque of the motor would be insuliicient to effect a prompt and positive return of the carriage.

The length of the contacts 20 and 21 may be varied aS desired; in practice, I have found it desirable to have the contact 21 of such length that the carriage. moves through about one-third of its range of movement before the arm 22 passes from the contact 21 to the contact 20.

In the drawings, I have shown a cord tension regulator 29 adapted to close the motor circuit at 30, its lines being in shunt with the main circuit at the.-points K and Z. The function of this device is fully described in my Patent No. 953,938, dated April 5 1910, so that detailed description thereof here is unnecessary.

It will thus be seen that the invention involves the provision of means for automatically controlling the effective power of the motor by the motor itself; that this includes means whereby the motor causes a reduction in the torque developed by the motor toward the end of the return movement of the carriage efiected by the motor; and that the reduction in the power of the motor to'ward the end of the return movement is roportional to the extent of the advance movement of the carriage. As the carriage advances, it sets the contacts of the resistance so as to determine the amount of resistance which shall be included in the motor circuit when the return movement of the carriage nears the end 'thereof. thermore, it will be seen that when the carriage is returned through short distances, special conditions prevail for insuring proper movement of the carriage; resistance is introduced into the 'motor circuit to cut down the torque .of the motor but the amount of this resistance is only suchas will prevent an undesirable jar at the end of the movement of the carriage.

While I have illustrated and described the embodiment of my invention which I prefer to employ, I realize that various other constructions may be employed to attain the objects of the present invention. I wish it understood, therefore, that I con sider the invention to be independent of the particular construction illustrated except where elements of construction are specified.

in the appended claims and that I aim to cover modifications of the construction described by the terms employed in the claims.

'What I claim is: 1. In a carriage-return mechanism, the

combination of a typewriter having a carriage, a motor, means operated by the motor for returning the carriage andmeans operated automatically by the motor for reducing but not wholly. discontinuing the effective power of the motor during the return movement ofthe carriagysubstantially ,as described. I

, 2. In a. 'carriage r'eturn mechanism, the combination of' a typewriter having a carriage, amotor, means operated by the motor {or returning the carriage and means open .ated automaticallyby the motor 'forredueing the effective .power of the'motorz'near the end. of the return movement of the car-v riage to permit-the carriageto ibefcarried to the end of its movementi h'y momentum,-

the m'otor being continued jinf operation a;

insure full return ofthe' ea' i ig 'g tially as describ d, z

3. In a carriage-return mechanism,-

' 1'] age, a motor, means operated by the motor stantially as described.

for returning the carriage and means operated automatically by the motor for reduc- 4. In a carriage-return.mechanism, the combination of a typewriter having a carriage, a motor, means operated by the motor .for returning the carriage and means oper-- ated automatically by the motor for reducing the effective power of the motor during. the return movement of the carriage, the

motor being continued in operation until the movement of the carriage has been com- Fur-V 'tial iy I asdescribed. v f

' the. efiective pleted to insure complete return of the carriage; substantially as described.

5. In a carriage-return mechanism, the combination of a typewriter having a carriage, a motor, means operated by the motor for returning the carriage, means for automatically reducing the effective power of the motor during the latter portion of a full return movement of the carriage, and means for automatically reducing the ellective power of the motor when returning the carriage throu 11 short distances, the amount of said reduction during short movements be ing different from the amount of the reduction duringthe corresponding portion of a full return movement; substantially as de scribed.

6. In a carriage-return mechanism the .combination of a typewriter having a carriage, a-motor, means operated by the motor for returning the carriage, means for auto matically reducin the effective power of the motor a relatively small amount. when returning the carriage short distances and means for automatically reducing the effective power of the motor a relatively large amount whenreturning the carriage through the latter portion of a full return movement; substantially as described.

7. In a carriage-return mechanism for typewriters, the combination of a motor, means operated thereby for returning the carriage, means for automatically reducing the effective power of the motor a predetermined amount when'returning thecarrjage through a predetermined portion of its range of movement at the end. of that ran" e of movement and means for automatically reducing the efiective power of the motora greater amount whenmovin the carriage through fliiai'd predetermined portion of its movem'e'i'rt atrtheend means operatedthereby for returning the 'tomatically redueing the e'flectw fxtlle motor during the latter. portionof the "return movement of the carriagean amount dependent upon the ex'tent of'the advance movement of the carriage, and means for reducing the effective power of the motor when returning thecarriage after a short advance movement an-amount less than the'amount to whichower of the motor is reduced,

when returnm the carriage through the same range at t e end of a full return movement of the carriage; substantially as described.

9. In a carriagemeturn mechanism for typewriters, the combination of a motor, means operated thereby for returning the carriage, a rheostat controlling the m t r 8, iIn a carnage-returhqmechanism :ior Etypewriters, the combination of amotor, V the:

combination of a typewriter having a car-1 of a flllliz. 1 return movement of the earrilage circuit, and means for operating the rheostat automatically to reduce but not wholly discontinue the efl'ective power of the motor during the return movement of the carriage effected by the motor; substantially as described.

10. In a carriage-return mechanism for typewriters, the combination of a motor, means operated thereby for returning the carriage, a rheostat controlling the resistance of the'motor circuit and means operated automatically by themotor for actuating the rheostat durin the return movement of ,the carriage, t e operation of the rheostat being dependent upon the extent of the advance movement of the carriage; substantially as described.

11. In a carriage-return mechanism, the

combination of a typewriter having a carriage, a motor, means operated by the motor for returning the, carriage, means for automatically introducing resistance into the motor circuit during the latter portion of a varying the amount of said resistance in accordance with the extent of the advance movement of the carriage; substantially as described.

12. In acarriage return mechanism, the combination of a typewriter having a carreturn movement of the carriage and for riage, a motor, means operated by the motor automatically during the advance variable resistance-j for regu for returning the carriage, a 'member positioned automatically during .the advance movement of the carriage for reducing the effective power of the motor durin a portiqnof the return movement efi'ecteg by the carriage and a second member positioned movement of the carriage for determining the amount of said reduction; substantially as described.

In a carriage-return mechanism, the combination of 'a'typewriter having a carfor. returning the carriage, a' member positioned automatically durin the advance movement of the carriage, or causing resistance to be introduced mto the motor circuit duringia portion of the meat of the carria rings, a motor, means operated by the motor and a second member positioned automatically during the advance movement of. the carriage for determining combinati return move;

of the advance movement of the carriage; substantially as described.

In a carriage return mechanism, the combination of a typewriter having a car riage, a motor 'for returning the carriage, a variable resistance for regulating the motor circuit, a contact member operated in accordance with the movement of the carriage to control the introduction of resistance into the motor circuit, a second contact member for controlling the amount of said resistance to be connected in the motor circuit, means for actuating the second contact member automatically during the latter part of the advance movement of the carriage, and means tor retaining the second contact member in the positionto which it was movedduring the advance movement of the carriage while the carriage is returned 1 by the motor substantially as described. 5

16. In a carriage-return mechanism, the combination of a. typewriter having a carriage, a motor for retnrnin the carriage, a variable resistance for reguIatingthe motor circuit, a contact member for the resistance, means for automatically positioning the contact member with respect to the resistance during the advance movement of the carriage and means for retaining the contact member in position durin the return movement of the carriage; su stantially as described.

17. In a carriage-return mechanism, the combination of a typewriter having a carriage, a motor for returning. the carriage. a

variable resistance for regulating the motor circuit, means actuated automatically during the advance movement of the carriage for selecting an amount of said resistance depending on the extent of the advance movement of' the carriage and means for connecting that amount of resistance in the motor circuit during a portion of thereturn movement of the carriage effected by the motor; substantially as described.

'18. In a carriage-return mechanism,the

on of a typewriter having a carriage, a motor for returning the carriage. a variable resistance for regulating the motor circuit, means actuated automatically during the latter part of the ad v'ance movement of. the carriage for positioning a contact with respect to the resistance, and means for retaining the contact in position-during the returnmovement of the carriage; substmr tially as described.

19. In a carriage-return mechanism, the combination :ofa typewriter having a carriage, a motor connected to the carriages member reciprocatcd in accordance with themovements of the carriage. 'means operated by said membcrfor reducingthe'eiiccti've power of the motor during the latter por tion of the return movement. and means controlled by the extent of the advance as described.

movement of the carriage for determining the amount of said reduction; substantially 20. In a carriage-return mechanism, the combination of a typewriter having a carriage, a motor connected to the carriage, a member reciprocated in accordance with the movements of the carriage, means operated by said member for reducing the effective power of the motor during the latter portion of the return movement, a second member positioned by the extent of the advance movement of the carriage and controlling the amount of said reduction and means for retaining said second member .in position throughout the return movement of the carriage; substantially as described.

21. In a carriage-return mechanism, the combination of a typewriterhaving a car ria'ge, a motor, a connection from the motor to the carriage, a tension regulator for the connection, a resistance for the motor circuit, and a contact member for theresistance connected to the motor and operatedthereby during the movement of the carriage-effected by the motor; substantially as described.

22. In a carriage-return mechanism, the combination of a typewriter having a carriage, a motor, a connection from the motor to the'carriage, a tension regulator for the connection, a resistance for the motor'circuit, a contact member" connected to the motor and operated thereby-forconnecting the resistance in 'circuit,.a; second contact member positioned by said member andcontrolling the amount of the resistance connected in circuit by the first member, and means for returning thesecondmemberto normal position independently of the motor'and the rst member; substantially as described.

- 23,111 a carriage-return mechanism, a' tlypewriteqa carriage therefor, a platen on e carriage, a lever-mounted on the. carriage andconnected to the fplaten for actuating the carriage.- and platen, a bar connected to said lever and mounted on the carriage so as to be movable longitudinally relatively to the carriage, a motor, and a flexible connection from the motor to said bar; substantiallyas described. I

24. In a carriage-return mechanism, a typewriter, a carriage, a platen, a lever mounted .on the-carriage at one side-of the.

typewriter and connected to the platen for actuating the platen and carriage, a inotor mounted on the same side of the typewriter as said lever, a'movable bar connected to said lever and extending therefrom in a direction; awa from the, motor, means for guiding the ar as itis moved and a flexible 7 connection from the motor to said base; substantially as described.

:25; In a carriage-return mechanism, a

typewriter. acarriage therefor, a rotatable substantially as described.

platen on the carriage, a lever mounted on the carriage and connected to the platen for rotating the platen to effect line spacing and for moving the carriage, a bar connected to the lever, said bar being movable independently of the carriage to operate the lever and movable with the carriage during the return movement of the carriage, a motor, and a flexible connection from the motor to said bar; substantially as described.

26. In a carriage return mechanism, a typewriter, a carriage therefor, a platen mounted on the carriage, line-spacing mechanism mounted at the right hand end of the platen and including a. line-spacing lever, a horizontal bar connected to said lever and extending to the left therefrom, means for supporting and guiding said bar, a motor, and a flexible connection from the motor to said .bar whereby horizontal movement of the bar to the right effected by the motor will operate the line-spacing lever and move the carriage to the rightrsubstantially as described.

27. In a carriage-return mechanism, a typewriter, a-carriage therefor, a platen on the carriage, line-spacing mechanism 10- catedat the right hand end of the platen and including a spacing lever for effecting line-spacing manually, a movable bar pivotallv connected at 'one end to the line-spacalso move thefcarriage uponthe typewriter" frame; substantiallyas described,

28. In a carriage-return mechanism for typewriters, a carriage and a gnotor for returning the carriage in combination with a rheostathaving a plurality of-contacts and means for introducing into the motor cir cuit resistance proportioned to the length of the return movement of the carriage; substantially as described. r 29. In a carriage-return mechanism for typewriters, a carriage and a motor for returning the carriage in combination with a rheostat; having a movable member, ,means for introducing into the motor circuit resistance proportioned tothe length of the return movement of the carriage, and meansfor restoring the movable member of .the rheostat to'its normal posltion u on completion of the return movement oft e carriage;

, 30. In .a carriage-return mechanism for typewriters, a carriage, a motor for returning the carriage, 'means for'causin'g-the mofor to initiate the return movement of the carriage with a strongimpulse, and .means for automatically reducing the effective power of the motor during the progress of the return movement of the carriage without opening the circuit of the motor; substantially as described.

31. In a carriage-return mechanism for typewriters, a carriage, a motor for returning the carriage, means for causing the motor to initiate the return movement of the ca rriage' with a strong impulse, and means for automatically reducing the e'fi'ective power of the motor during the progress of the return movement of the carriage without opening the circuit of the motor, said means including devices for introducing into the motor circuit resistance proportioned to the length of the travel of the carriage whereby full return movement of the carriage is insured by the momentum acquired by the carriage in the firstportion of its movement or by the motor operating with reduced power; substantially as described.

32. In a carriage-return mechanism for typewriters, the combination of a carria e, a motor, means operated by the motor or returning the carriage, a rheostat controllingflie motor circuit, means for setting the movable member of the rheostat automatically during thea'dvance movement of the carriage, and means for'holding said -movable member in position during the return movement of the carriage; substantiallyas described.

33. In a carriage-return mechanism,,the combination of a typewriter having a carriage, a motor,'means operated by the motor for returning the carriage, a rheostat controlling the motor circuit', means for setting the rhcostat controlling the motor circuit, means for setting the rheostat automatically to correspond to the length of the printed line, means operated by the return movement of the carria e to cut out the resistance of the rheostat urin'g the first portion of the return movemenhand means for including said resistance in the motoecircuit during the latter part of the return movement; substantially as described, j

- 34. In a carriage-return mechaniyznnthe combination of-a typewriter having a carriage, a motor, means operated by the motor for returning the carriage, a rheostat having a movable member controlling the resistance of the motor circuit, means operated 'by the motor for automatically positioning said movable member during the writing of a line of print, means for holding said member in the position to which it is moved during the return movement of the carriage, and means'for automatically restoring said member to its initial position onthe completion of the return movement; substantially as described.

'35. In a carriage-return mechanism, the combination of a typewriter having a car riage, a motor, means operated by the motor for returning the carriage, a rheostat having a movable member adapted to control the resistance of the motor circuit, means operated automatically by the advance movement of the carriage for cutting in resistance proportioned to the length of the advance movement, means for retainin the movable member of the rheostat in the po sition in which it has thus been set, means for cutting out the resistance during the .first portion of the return movement of the carriage, means for automatically including the resistance in the motor circuit during the latter part of the return movement, and means for restoring the movable member of the rheostat to its normal position on the completion of the return movement; substantially as described.

36, In a carriage return mechanism, the combination of a typewriter having a carriage, a motorfor returning the carriage, means for causing the motor to impart a strong initialimpulse to the carriage, and means for automatically inserting resistance into the" motor circuit during the progress of the return,movement of the carriage; substantially as described.

37. In a carriage-return mechanism, the combination of a typewriter having a carriage, an electric motor for returning the carriage, means for causing the motor to impart a strong" initial im also to the carriage, means for causing t 0 motor to con tinue said impulse during a portion of the return movement, and means for auto- 'matically insertingresistance into the motor circuit at a predetermined point durin the ing resistance into themotoi; circuit during the progress of the return movement, said resistance being automatically proportioned to the distance to betraveled by the carria e m-its return movement; substantially as e:

scribed.

39. In a carriage-return mechanism, the combination of a typewriter havm a, carriage, anelectric motor for returning the carriage, means for causing the motor to imparta strong impulse to the carriage. at the beginning of the return movement, means for continuing-said impulse during a portion of-th'e return movement, means ,for automatically insertingresistance into the motor circuit during the progress of the return movement, and means operated automatically-for cutting out said resistance on the completion of the return movement of the carriage; substantially as described.

40. In a carriage-return mechanism, the combination of a typewriter having a carringe, an electric motor for returning; tliu rnrringe, means for automatically inserting :1 graduated rcsistnnre into the motor nircnit, said resistance being proportioned t the travel of the carriage during the mtnrn movement, and means operated untrr nmtiually for cutting out said. Y'CSiSEtlTN'Q 0n the completion of the return movement; 10 substantially as described.

[n testimony whereof I uflix my signature in pressure of two WltHQSSQS.

NEAL LARKIN ANDERSON.

\Vitnrssrs: I

Gm. W. CUON, T1105. MAs'rm.

In a carriage-reurn mechanism, the cenihinstien GI a typewriter having a carriage, an electric motor for resuming the carriage, for automatically inserting the cnmpietion of the return movement; substantially as described.

"In testimony whersof I affix my signature in presence 01: two witnesses.

a graduated resistance into the motor sin cnii, said resistancebeingproportioned to the travel 01: the carriage during the return movement, and means operated automatisaily for ousting out said resistance on NEAL LARKIN ANDERSGN.

i Vitnesses? GEO. VI. SOON, Tnos. Msis'rm.

7 It is 'hesehy certified that in Letters Patent No. 387,124, granted June 13, 1916, upon the spniicstien 0f Neal Larkin Anderson, of Winston-Salem, North Carolina, for an im jmvement in Type-Writer Carriage-Return Mechanism, error appears in the printed sneeific-atinn requiring eorrectien as fniiowsi Page 8, iines 38-89, eiaixn 33, strike out the Words controlling the nintor eircuit, means for setting the rheoststfiflnd that the said Letters Patent should be ma wish correlation e at the same ms eonform t0 the record 0f the case in the Faifiens @fins,

s Vrem Signed; and sealed this 25th (is of July; A. 1)., 1916.

[SEAL] F. W. H. si ns,

Aiciin Gommissinnere Q 'FaE It is hereby certified that in Letters Patent No. 1,1R?,124,granted June 123, 1916, upon the apnlicatien of Nczil harkin Anderson, of Winstonfialom, North Cnrnlimi,

for an improvement in Typn-Writnr Carriage-Return Mechanism, an error uppmns in the printed specification requiring correction follows: Page 8, lines 38439,

(jiuirn 37%, strike out the words mnlrolling the motor i-ircnit, means for setting iii! rhousmt; and that the said Letters Patent should he read with this correction therein that the name may conform to the record of the case in the Patent Other.

Signed and sealed this 25th day of July; A. D., 1916.

[SEAL] b. w. H. (,LAX".

Acting Commissioner of Pahmta. 

